alter egoX4 tap tempo problems

i Have an alterego X4 too! but a have problem with the tap tempo! is not responding very well to my foot when I press the tap switch! and what happened i think is when I was switching from 4th note to 8th note the switch got stucked and I had to use plyers to pull and release the switch that allows you to go from 4th to 8th note! NOW! the tap tempo is not responding! doesnt tap what my foot wants! any idea how to fix it????!